Over the weekend I was re-organizing my laptop bag, which contains most of my GHB. I looked at a flashlight and thought, I should try that out. It was DEAD! Popped the battery cover of to find that one of the batteries was just starting to corrode. YIKES.
I went through all the flashlights around the house and replaced batteries as a precaution.
Guess the new rule is when the clock adjust one hour, I'll check all batteries in the bags. Don't wanna hafta try and change batteries in the dark.

Amendment II
A well regulated militia, being necessary to the security of a free state, the right of the people to keep and bear arms, shall not be infringed.

Thats a great tip, I walk by my lights alot and often don't take the time to check them for battery life.
Now the question is what else can be added to the check list to make sure it's in working order.

'A government big enough to give you everything you want,
Is big enough to take away everything you have.'

Other than batteries, the first thing I can think of is anything that is perishable. Food. I have mainstay bars in my vehicle bag, long life, but flimsy foil wrapping. My first pack of bars had a hole wear into a corner, it lost it's seal. My new pack, is inside a vacuum sealed bag.

Medical supplies (pain meds, antihistamine, anti-bacterial, etc.) all have a "shelf life" are they still good after the use by date? Probably, but why chance it.

Amendment II
A well regulated militia, being necessary to the security of a free state, the right of the people to keep and bear arms, shall not be infringed.